Shikaku

Shikaku (also known as Rectangles) is a logic puzzle with simple rules and challenging solutions.

The rules are simple. You have to divide the grid into rectangular and square pieces such that each piece contains exactly one number, and that number represents the area of the rectangle.

Click and drag to draw a rectangle. To remove lines use the right mouse button or hold the Ctrl or the Shift key.

Video Tutorial

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This Month
1.	GeorgPfleger	00:07.24
2.	gh	00:08.65
3.	SirDiscalot	00:08.77
4.	qianyek	00:10.16
5.	Einsteinus	00:10.84
6.	215zzq	00:11.89
7.	Dorice	00:12.03
8.	kovacsl22	00:12.12
9.	NOHJIWAN	00:12.93
10.	mrgmath	00:14.66
11.	Chinatju	00:16.01
12.	HackMan	00:17.99
13.	Nieznany	00:18.52
14.	青栀	00:18.55
15.	oursinblanc	00:18.69
16.	hill_of_hellones	00:20.25
17.	FunAcroFly	00:21.35
18.	CLAVDIVS	00:22.26
19.	NaNO3	00:22.57
20.	yasuyo	00:25.63

This Week
1.	gh	00:08.65
2.	GeorgPfleger	00:10.24
3.	NOHJIWAN	00:12.93
4.	Chinatju	00:16.01
5.	Nieznany	00:18.52
6.	CLAVDIVS	00:24.93
7.	Koakuma	00:27.67
8.	--- empty ---	--:--
9.	--- empty ---	--:--
10.	--- empty ---	--:--
11.	--- empty ---	--:--
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17.	--- empty ---	--:--
18.	--- empty ---	--:--
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20.	--- empty ---	--:--

Today
1.	GeorgPfleger	00:12.97
2.	--- empty ---	--:--
3.	--- empty ---	--:--
4.	--- empty ---	--:--
5.	--- empty ---	--:--
6.	--- empty ---	--:--
7.	--- empty ---	--:--
8.	--- empty ---	--:--
9.	--- empty ---	--:--
10.	--- empty ---	--:--
11.	--- empty ---	--:--
12.	--- empty ---	--:--
13.	--- empty ---	--:--
14.	--- empty ---	--:--
15.	--- empty ---	--:--
16.	--- empty ---	--:--
17.	--- empty ---	--:--
18.	--- empty ---	--:--
19.	--- empty ---	--:--
20.	--- empty ---	--:--

MO3
1.	zahhydude1	00:03.48
2.	vowels	00:03.81
3.	demian2	00:04.66
4.	Vicellen	00:04.70
5.	BingBongBob	00:05.15
6.	JZE	00:05.16
7.	numbrr	00:05.20
8.	nabi	00:05.27
9.	coolcoolguy65	00:05.33
10.	mtanzer	00:05.34

AO5
1.	zahhydude1	00:03.76
2.	vowels	00:03.88
3.	demian2	00:04.92
4.	Vicellen	00:05.06
5.	numbrr	00:05.32
6.	BingBongBob	00:05.39
7.	nabi	00:05.41
8.	bearn	00:05.55
9.	JZE	00:05.75
10.	coolcoolguy65	00:06.01

AO12
1.	zahhydude1	00:04.54
2.	vowels	00:04.91
3.	BingBongBob	00:05.84
4.	Vicellen	00:06.24
5.	numbrr	00:06.26
6.	demian2	00:06.31
7.	JZE	00:06.39
8.	bearn	00:06.41
9.	coolcoolguy65	00:06.66
10.	nabi	00:06.91

Robots / programmatic solvers		info
1.	tlstyer	00:00.006
2.	Charlie Li	00:00.207
3.	Paul Bismuth	00:01.692

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
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2025-09-05 10:49:48

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